Waveguides with integrated spacers and related systems and methods

A head-mounted near-eye display system includes a stack of waveguides having integrated spacers that separate the waveguides. The waveguides may each include a diffractive optical element formed simultaneously with the spacer by imprinting or casting. Spacers are disposed on one or more major surfaces of the waveguides and define a distance between directly adjacent waveguides. Adjacent waveguides may be bonded using an adhesive on the spacer. The spacer may fit within the indentation of the upper layer waveguide. In some cases, the spacers may form one or more material walls that substantially surround a perimeter of the associated waveguide. Vent holes may be provided in the wall to allow gas to flow into and out of the interior volume defined by the spacer. A debris capture structure may be provided between the two spacer walls to capture and prevent debris from entering the interior volume. 一种头戴式近眼显示系统包括具有将波导分离的集成间隔物的波导堆叠。波导可以各自包括通过压印或铸造与间隔物同时形成的衍射光学元件。间隔物设置在波导的一个或多个主表面上并且定义直接相邻波导之间的距离。相邻的波导可以使用间隔物上的粘合剂结合